MODEL QUESTION PAPER-1
II PUC- CHEMISTRY (34)
Time: 3 hours 15 min. Max Marks: 70
Instructions:
1) The question paper hasfour parts: A, B, C and D. All parts are compulsory.
2) Write balanced chemical equations and draw labeled diagrams wherever
required.
3) Use log tables and simple calculator if necessary. (Use of Scientific calculators is
not allowed).
PART AA
I Answer ALL of the following. [Each question carries 1 mark] 10x1=10
(Answer each question in one ord or in one sentence)
1. What does the Van't Hoff factor'? for a solute in a solvent account for?
2. How does the enthalpy change during the formation of a non-ideal solution
of two liquids showing positive deviation from Raoult's law?
3 What is a secondary cell?
4. Unit of rate constant of a reaction is same as the unit of rate of reaction.
What is the order of reaction?
5. Define heterogeneous catalysis.
6. Give the composition of copper matte.
7. Noble gases have very low boiling point. Why?
8. Give the IUPAC name of CH2=CHCH;Br.
9. Acetic acid is soluble in water. Give reason.
10. Name the Nitrogenous base present in RNA only.
PART B
II Answer any FIVE of the following. [each question carries 2 marks] 5x2-10
11.How many tetrahedral and octahedral voids are possible if the number of
close packed spheres in two layers is N?
, reactions in Zn Cu Daniel cell
cathodic half cell
-
and
12. Write anodic
equation. What is Ea in the equation?
13.Give Arrhenius
two consequences
of lanthanoid contraction.
14. Mention
converted into 2-methoxy toluene and 4- methoxy
15. How is anisole
toluene? Give the equation.
16. CH KOH/glycol What are P and Q?
NH:NH:-NH
heat
Q+N
H:0
CH
17.What is a broad spectrum antibiotic? Give an example.
18. Explain saponification with an example.
PART C
Answer any FIVE of the following. Each question carries 3 marks] 5x3=15
III
19. How is pure alumina obtained from bauxite by leaching process?
20 Explain manufacture of nitric acid by Ostwalds process.
2
21.a. Complete the reactions.
i)2KCIO MnO,2
ii)4HCI+O2 CuCl,2
b. Draw the structure of sulphuric acid.
22. a. Give any two reasons for anamalous behaviour of Fluorine.
b. Inter halogen compounds are more reactive than halogens. Why?
2
23.a. Transition metals and their compounds are used as catalysts.
Give two reasons.
b. Out of the following elements, identify the element which does not
exhibit variable oxidation state: Cr, Co, Zn.
24 How is KCr;0, is manufactured from chromite ore?
25. Using valence Bond Theory account for the geometry and magnc
property of [Ni(CN)4.
3
26. Write any three postulates of Werners theory of complexe
, PART D
IV Answer any THREE of the
following [Each question carries 5marks 3x5=15
27. a. Calculate the
packing efficiency in FCC. 3
b.If a metal with atomic mass 209 crystallises in a simple cube lattice.
What is the edge length of its unit cell?
(Given d 91.5 kg m°)=
2
28.a. The boiling point of benzene is 353.23k when
1.80 g of a non-
volatile, non-electrolytic solute was dissolved in 90g of benzene the 3
boiling point was raised to 354.1 1k. Calculate the molar mass of the
solute.
k for benzene =
2.53 K.kg mol"].
b. What is reverse osmosis? Mention one application of it.
2
29.a. Calculate the equilibrium constant of the reaction at 298k.
3
Mgt+2Agi Mg* +2Ag Fcell+3.16v
b. Write the reactions occurring at cathode and anode in H2-0, fuel cell. 2
30. a. Derive an integrated equation for the rate constant of I order
reaction. 4
b. What is pseudo I order reaction? 1
31.a. What are emulsions? Give an example for o/w emulsion. 2
b. What is the cause for Brownian movement?
c. Write the differences between physisorption and chemisorption with 2
respect to reversibility and specificity.
V. Answer any FOUR of the following. [Each question carries 5 marks] 4x5-20
32. a. Explain SN mechanism with an example. 2
b. Name the product formed when chloromethane reacts with
2
i) aqueous KOH and
ii) alcoholic AgCN.
C. Give an example for polyhalogen compound.
II PUC- CHEMISTRY (34)
Time: 3 hours 15 min. Max Marks: 70
Instructions:
1) The question paper hasfour parts: A, B, C and D. All parts are compulsory.
2) Write balanced chemical equations and draw labeled diagrams wherever
required.
3) Use log tables and simple calculator if necessary. (Use of Scientific calculators is
not allowed).
PART AA
I Answer ALL of the following. [Each question carries 1 mark] 10x1=10
(Answer each question in one ord or in one sentence)
1. What does the Van't Hoff factor'? for a solute in a solvent account for?
2. How does the enthalpy change during the formation of a non-ideal solution
of two liquids showing positive deviation from Raoult's law?
3 What is a secondary cell?
4. Unit of rate constant of a reaction is same as the unit of rate of reaction.
What is the order of reaction?
5. Define heterogeneous catalysis.
6. Give the composition of copper matte.
7. Noble gases have very low boiling point. Why?
8. Give the IUPAC name of CH2=CHCH;Br.
9. Acetic acid is soluble in water. Give reason.
10. Name the Nitrogenous base present in RNA only.
PART B
II Answer any FIVE of the following. [each question carries 2 marks] 5x2-10
11.How many tetrahedral and octahedral voids are possible if the number of
close packed spheres in two layers is N?
, reactions in Zn Cu Daniel cell
cathodic half cell
-
and
12. Write anodic
equation. What is Ea in the equation?
13.Give Arrhenius
two consequences
of lanthanoid contraction.
14. Mention
converted into 2-methoxy toluene and 4- methoxy
15. How is anisole
toluene? Give the equation.
16. CH KOH/glycol What are P and Q?
NH:NH:-NH
heat
Q+N
H:0
CH
17.What is a broad spectrum antibiotic? Give an example.
18. Explain saponification with an example.
PART C
Answer any FIVE of the following. Each question carries 3 marks] 5x3=15
III
19. How is pure alumina obtained from bauxite by leaching process?
20 Explain manufacture of nitric acid by Ostwalds process.
2
21.a. Complete the reactions.
i)2KCIO MnO,2
ii)4HCI+O2 CuCl,2
b. Draw the structure of sulphuric acid.
22. a. Give any two reasons for anamalous behaviour of Fluorine.
b. Inter halogen compounds are more reactive than halogens. Why?
2
23.a. Transition metals and their compounds are used as catalysts.
Give two reasons.
b. Out of the following elements, identify the element which does not
exhibit variable oxidation state: Cr, Co, Zn.
24 How is KCr;0, is manufactured from chromite ore?
25. Using valence Bond Theory account for the geometry and magnc
property of [Ni(CN)4.
3
26. Write any three postulates of Werners theory of complexe
, PART D
IV Answer any THREE of the
following [Each question carries 5marks 3x5=15
27. a. Calculate the
packing efficiency in FCC. 3
b.If a metal with atomic mass 209 crystallises in a simple cube lattice.
What is the edge length of its unit cell?
(Given d 91.5 kg m°)=
2
28.a. The boiling point of benzene is 353.23k when
1.80 g of a non-
volatile, non-electrolytic solute was dissolved in 90g of benzene the 3
boiling point was raised to 354.1 1k. Calculate the molar mass of the
solute.
k for benzene =
2.53 K.kg mol"].
b. What is reverse osmosis? Mention one application of it.
2
29.a. Calculate the equilibrium constant of the reaction at 298k.
3
Mgt+2Agi Mg* +2Ag Fcell+3.16v
b. Write the reactions occurring at cathode and anode in H2-0, fuel cell. 2
30. a. Derive an integrated equation for the rate constant of I order
reaction. 4
b. What is pseudo I order reaction? 1
31.a. What are emulsions? Give an example for o/w emulsion. 2
b. What is the cause for Brownian movement?
c. Write the differences between physisorption and chemisorption with 2
respect to reversibility and specificity.
V. Answer any FOUR of the following. [Each question carries 5 marks] 4x5-20
32. a. Explain SN mechanism with an example. 2
b. Name the product formed when chloromethane reacts with
2
i) aqueous KOH and
ii) alcoholic AgCN.
C. Give an example for polyhalogen compound.
